Choosing a Kernel Some m68k subarchs have a choice of kernels to install. In general we recommend trying the most recent version first. If your subarch or machine needs to use a 2.2.x kernel, make sure you choose one of the images that supports 2.2.x kernels (see the MANIFEST). All of the m68k images for use with 2.2.x kernels, require the kernel parameter &ramdisksize;.